Extension edge box



April 11, 1939. s. BERGSTEIN EXTENSION EDGE BOX 2 Sheets-Sheet 1 Filed Oct. '7, 1937 INVENTOR. JAM/J51. BERGS TE/N. BY 1 ATToRNEYs.

April 1939- s. BERGSTEIN EXTENSION EDGE Box Filed Oct. '7, 1937 2 Sheets-:Sheet 2 INVENTOR. SAMUEL BERGS raw.

ATTORNEYIS.

Patented Apr. 11, 1939- UNITED STATES EXTENSION EDGE BOX Samuel Bergstein, Cincinnati. Ohio, assignor to Edna May Bergstein and Robert Morris Bergstein, Cincinnati, Ohio, as trustees Application October '7, 1937, Serial No. 167,789

3 Olaimsv (01. 229-34) walls of the box. which panels are adaptable to be folded into frictional or locking retention upon assembly of the box, to retain it in erect form,

and my present invention is directed particu- 15 larly to improvements in these structures.

In my type of extension edge box, the outer;

edges of the main body panel are defined by lines of fold, giving a rounded and finished appearance to these edges. However, when the box go is assembled, the cut or raw edges of the two opposite walls to which the additional locking panels are articulated, appear at the four corners of the box, thereby tending to destroy the smooth finished appearance of the assembled 25 box. I discovered that byplacing additional tabs at the edges of these panels, articulated to said panels by lines of fold, thereafter folding in and securing (if desired) these tabs to the panels to which they are articulated, a rounded or finished an edge can be obtained at the corners of. the box, and this is one of the objects of my invention. It will be simpler to explain this and other objects of my invention by referring to the draw mgs. 35 In the drawings in which several modifications illustrative of my inventionare disclosed, without thereby intending to exclude other modifications: Figure 1 is a perspective view of a box partly erected manufactured according to my invention. Fig. 2 is a, plan view of the form of blank of the manufacture of, this box.

Fig. 2a is a detail illustrating a step of applying adhesive to the blank of Fig. 2. r

Figs. 3, 4, 5 and 6 show successive steps in the 5 gluing and folding of the blank illustrated in Fig. 2.

Fig. 7 is a view of a blank for forming a modification of the box shown in Figs. 1 to 6.

Fig. 8 is a perspective of a box partially erected 50 in accordance with this modification.

Fig. 9 is a view of a blank of another alternative form.

Fig; 10 is a perspective view of the box constructed from the blank 01' Fig. 9.

For purposes of comparison, Figs. 2 to 6 correand gluing the various types of boxes inmy said walls 3a are panels 6, 6 with friction end folds PATENT OFFICE spend generally to Fig. 24 of my aforesaid copending application,-- and Fig. 9 corresponds to Fig. 18 of my aforesaid co-pending application, and the same mechanism suitable for folding co-pending application will be applicable to folding and gluing the structures illustrated above. Referring now to Fig. 2, I show a blank with a main body portion A, extension edge zones i and 2 at the sides thereof, and 3 and 4 at the 10 ends. There are side walls la. and 2a, and end walls 3a and 4a. On the side walls are terminal diagonally scored flaps 5, one for each corner of the box when erected, extending from the end 1, I. In the extent now described, the blank of Fig. 2 does not differ in general from the blanks illustrated in Fig. 24 of my former application. It will be notedhowever, that the apex of the corner flaps 5 is cut out at in and that the edges 5b of the flaps are tapered away for a purpose which will be described. Projecting laterally from the end walls 3a, 4a of the blank, are the articulated panels 8, my object being to fold these two panels inwardly over each of the end walls 3a and 4a, thus forming a rounded edge for the end walls in the completed box.

The application of adhesive in folding this blank to form the box of Fig. 1, as has already been noted, will be accomplished by the use of the mechanism of my co-pending application. Since this mechanism provides a way for folding flaps inwardly over a moving blank while in one direction of motion, along lines which are offset from each other, an optional first step in the formation of a box from the blank of Fig. 2 will be to apply adhesive to the panels 8, as illustrated in Fig. 241 by the .dots on the panel 8.

Whether adhesive is applied to the panels or not, the first step is to fold these panels in- 40 wardly over the end wall portions of the blank and retain them there while the blank moves along and adhesive is applied to the extension edge zones I and 2.

The next step of the operation is to turn the side walls of the blank inwardly over the blank as it moves along making the fold on the inner lines of the extension edge zones, so as to bring the side walls to the position shown in Fig. 4, and the form of the-adhesively joined extension edges 59 for the box.

The next step is to change the orientation of the box with respect to its direction of travel, the usual practice being to move the box at right angles to its primary direction oi. movement.

When this movement is started, the walls 3a and 40: with the extensions thereon are deflected Adhesive will then be applied to the extension ed-ge zones 3 and 4, and to the diagonally articulated ends of the corner panels 5. Thereupon as the blank moves along, the end walls with their projecting panels are turned inwardly over the moving blank causing the extension zones 3 and 4 to be adhered to the main body panel and completing the box, in a knock-down condition. To set up the box, the end walls are turned outwardly, the side walls erected, and thereupon the end walls may be raised and the panel 6 turned over into the box with the friction end I resting on the bottom of the box, this last operation being illustrated in the partially erected walls in Fig. 1.

It can now be noted that the efiect of providing the flaps 8, 8 on the end walls and securing the corner panels 5 thereto results in forming a folded edge on both sides of each end wall, which edge in the absence of the flap 8 would remain as cut or raw edges in the completed box. The cutting away of the corner panels at 51) brings the raw or cut edge inside of the edge of the end wall at each side, thus effectively removing this cut edge from view.

As a result I have a knock-down box capable of being retained in erected position by infolded panels with no raw edges showing, unless it be for the edges of the side panels themselves.

In order to avoid a cut edge for the edges of the side panels, I may provide for an additional laterally extended panel lb and 2b in the blank as shown in Fig. '7, and during the preliminary stages of folding, applying adhesive to these end panels and turning them inwardly over the side walls, with the result as shown in Fig. 8, of a knock-down box with extension edges, every exposed portion of the box being a doubleedge.

In the modification of Figs. 9 and 10, I do not apply any adhesive to the corner panels which in this instance I have numbered 9, since the other panels in this blank are substantially alike to those in the blanks already described.

The operations in forming the box from this second blank may be the same as in forming the boxes already described, but in erecting the box the corner flaps 9, 9 are turned inwardly by hand, as illustrated in Fig. 10. While this box is not as strong or secure as my more preferred form primarily illustrated, the product has the like advantages of showing no raw or uncut edges at the exposed portions of the corners of the final structure.

As compared to the boxes in my former application, my present boxes use no more material because a portion of the board which in my former application was thrown aside as waste, is

now by my present invention employed for finishing the edges of the end walls.

It will be understood that by reference to sides and ends of a box, I have merely intended to draw a distinction to simplify the description without meaning that the relative dimensions to the walls have any particular bearing.

Having thus described my invention, what I claim as new and .desire to secure by Letters Patent is:

1. A box in flat or knocked-down form having a main body portion and side and end walls connected thereto by intermediate panels to constitute extension edges, said intermediate panels being adhered to adjacent parts of the main body panel to constitute extension edges for the completed box, said side walls having corner flaps attached thereto, the said end walls having frictional engaging overlapping flaps attached to the outer edges thereof, and reinforcing tabs connected by lines of fold to the side edges of said end walls and folded in upon said end walls, the said corner flaps being divided by a diagonal fold and the oute portions thereof secured to the said reinforcing tabs on the end walls.

2. A box in flat or knocked-down form having a main body portion and side and end walls connected thereto by intermediate panels to constitute extension edges, said intermediate panels being adhered to adjacent parts of the main body panel to constitute extension edges for the completed box, said side walls having corner flaps attached thereto, the said end walls having frictional engaging overlapping flaps attached to the outer edges thereof, and reinforcing tabs connected by lines of fold to the side edges of said end walls and folded in upon said end walls, and

caused to adhere to the said end walls, the said corner flaps being divided by a diagonal fold and the outer portions thereof secured to the said reinforcing tabs on the end walls.

3. A box in flat or knocked-down form having a main body portion and side and end walls connected thereto by intermediate panels to constitute extension edges, said intermediate panels being adhered to adjacent parts of the main body panel to constitute extension edges for the completed box, said side walls having corner flaps attached thereto, the said end walls having frictional engaging overlapping flaps attached to the outer edges thereof, and reinforcing tabs connected by lines of fold to the side edges of said end walls and folded in upon said end walls, the said corner flaps being divided by a diagonal fold and the outer portions thereof secured to the said reinforcing tabs on the end walls, the edges of said corner flaps being, tapered so that the cut edges are not exposed at the corners of the erected box.

SAMUEL BERGSTEIN. o0 

